Fits 1980-1996 Ford F-150 2WD pickups, including Lightning, XL, XLT, Eddie Bauer, and Custom models.

The QA1 Stocker Star Series TD807 rear shock absorber provides precision suspension tuning for the rear of your classic Ford F-series truck. These double-adjustable shocks feature independent 18-way adjustments for both rebound and compression, allowing you to dial in the exact ride quality and handling characteristics required for your application. Constructed from lightweight billet aluminum with a smooth body finish, these shocks bolt directly to factory mounting locations for a straightforward installation.

• Manufacturer Part Number: TD807
• Independent 18-way compression and rebound adjustment (324 possible valving combinations)
• Compressed length: 13.625 inches
• Extended length: 21.125 inches
• Lightweight billet aluminum construction with a clear anodized finish
• 100% dyno tested and serialized to ensure consistent performance
• Serviceable and rebuildable design for long-term reliability
• Direct bolt-in installation with high-quality bushings included
• Proudly made in the USA
• Manufacturer Limited Lifetime Warranty

Fits 1973-1986 Chevrolet C10 Pickup and C10 Suburban (Base, Big Ten, Cheyenne, Custom, Custom Deluxe, Deluxe, Scottsdale, and Silverado).

The QA1 Stocker Star Series provides a direct bolt-in solution for upgrading the rear suspension of your 1973-1986 Chevy square-body. These double-adjustable shocks feature independent 18-way adjustment for both compression and rebound, allowing you to dial in the perfect balance between street comfort and high-performance handling. Constructed from lightweight billet aluminum with a smooth body finish, these shocks are designed to work seamlessly with factory mounting points and suspension geometry.

Every TD803 shock is 100% dyno tested and serialized at QA1's Minnesota facility to ensure consistent damping performance. Unlike disposable factory units, these are fully serviceable and rebuildable by authorized service centers, making them a long-term investment for your C10 or Suburban. Proudly made in the USA.

• Independent 18-way compression and rebound adjustment
• Lightweight billet aluminum smooth body construction
• Compressed Length: 13.625 in
• Extended Length: 21.125 in
• Direct bolt-in installation to factory mounts
• 100% dyno tested and serialized
• Rebuildable and serviceable design
• Manufacturer Part Number: TD803
• Limited Lifetime Warranty

Fits 1967-1969 Chevrolet Camaro and Pontiac Firebird models with multi-leaf rear springs.

The QA1 Stocker Star Series TD802 rear shock absorber provides precision suspension tuning for classic F-body platforms. These double-adjustable shocks feature independent 18-way adjustment for both compression and rebound, allowing you to dial in specific ride quality and handling characteristics without removing the shock from the vehicle. This makes them an ideal solution for cars that pull double duty on the street and the drag strip.

Built from lightweight billet aluminum, these smooth-body shocks are designed as a direct bolt-in replacement for factory hardware. Every unit is 100% dyno tested and serialized to ensure performance consistency across the pair. Because they are fully rebuildable and serviceable, they offer a long-term suspension solution that grows with your build.

• Double-adjustable valving with 18 independent positions for compression and rebound
• Lightweight billet aluminum construction with a smooth finish
• Compressed Length: 13.25 inches
• Extended Length: 20.5 inches
• Direct bolt-in installation to factory mounting points
• 100% dyno tested and serialized
• Rebuildable and serviceable by QA1 authorized centers
• Proudly made in the USA
• Manufacturer Part Number: TD802

Fits select 1957-1996 Buick, Chevrolet, Oldsmobile, and Pontiac A, B, G, and X-body vehicles, including Chevelle, Impala, Regal, and Cutlass.

The QA1 Stocker Star Series rear shock absorber provides professional-grade suspension tuning for classic GM platforms. Engineered with a lightweight billet aluminum smooth body, these double-adjustable shocks feature independent 18-way adjustment knobs for both rebound and compression valving. This design allows you to precisely dial in your vehicle's handling characteristics for street comfort or track performance without removing the shocks from the chassis.

These shocks are designed for a direct bolt-in installation that utilizes your factory mounting points and works with the OE suspension configuration. Each unit is 100% dyno tested and serialized to ensure valving consistency. Unlike many aftermarket options, the Stocker Star Series is fully serviceable and rebuildable by authorized centers, providing a long-term solution for high-performance damping.

• Independent 18-way rebound and compression adjustment
• Lightweight billet aluminum construction
• 13.75-inch collapsed / 21.25-inch extended length
• Direct bolt-in replacement for factory shocks
• Fully rebuildable and serviceable design
• Made in the USA
• Manufacturer Part Number: TD801

Fits 1963-1972 Chevrolet C10 Panel, Pickup, and Suburban models with leaf spring rear suspension.

The QA1 Stocker Star Series rear shock absorber (TD709) provides precision suspension tuning for classic Chevy C10 trucks. Featuring independent 18-way adjustment knobs for both rebound and compression, these shocks offer 324 possible valving combinations to bridge the gap between street comfort and track performance. The smooth-body design is CNC machined from lightweight billet aluminum and is a direct bolt-in replacement for factory hardware.

• Independent Valving: 18-way adjustable compression and 18-way adjustable rebound settings.
• Billet Aluminum Body: Lightweight construction with a high-quality finish, manufactured in the USA.
• Serviceable Design: Shocks are 100% dyno tested, serialized, and fully rebuildable.
• Direct Fit: Designed for an easy bolt-in installation using factory mounting points.
• Dimensions: 12.875-inch collapsed length and 19.5-inch extended length.

Fitment Table:

Fits 1979-2004 Ford Mustang (Base, Cobra, GT, LX, Mach 1, SVO, and SVT Cobra).

Achieve professional-level suspension tuning with the QA1 Stocker Star Series rear shock absorber. Designed as a direct bolt-in replacement for the factory rear shocks, these lightweight billet aluminum units feature double-adjustable valving, allowing you to independently adjust rebound and compression across 18 positions each. This total of 324 valving combinations provides the precision needed to dial in your Mustang for anything from daily street driving to competitive drag or road course applications.

Each shock is 100% dyno tested and serialized to ensure consistent performance out of the box. The smooth-body aluminum construction provides superior heat dissipation and weight savings over OE steel shocks. These units are fully rebuildable and serviceable by QA1 authorized centers, ensuring long-term reliability for your performance build.

• MPN: TD706
• Adjustment: Double Adjustable (Independent Rebound and Compression)
• Valving: 18-way independent clicks
• Compressed Length: 13.25 in
• Extended Length: 20.5 in
• Material: Lightweight Billet Aluminum
• Installation: Bolt-in, compatible with factory suspension points
• Origin: Made in the USA
• Warranty: Limited Lifetime Warranty

Fits select 1962-1976 Chevrolet Chevy II, Nova, and Camaro, Ford Torino, and Pontiac Firebird.

Upgrade your classic’s handling and ride quality with the QA1 Stocker Star Series rear shock absorber. These double-adjustable shocks provide independent control over compression and rebound, allowing you to fine-tune your suspension for the track, the street, or anything in between. Constructed from lightweight billet aluminum, these smooth-body shocks offer a significant weight reduction over factory units while maintaining a clean, professional appearance.

Designed for easy bolt-in installation into factory mounting points, the TD703 replaces your worn OE components without the need for modification. Each shock is 100% dyno-tested and serialized to ensure consistent performance. Because they are fully serviceable and rebuildable, these shocks are a long-term investment in your vehicle's performance.

• Part Number: TD703
• Series: Stocker Star
• Adjustability: Double adjustable (18 positions for rebound and compression)
• Extended Length: 19.0 in.
• Collapsed Length: 12.375 in.
• Material: Billet Aluminum
• Body Type: Smooth body, non-coilover
• Features: Made in the USA, dyno-tested, rebuildable
• Warranty: Limited Lifetime Warranty

Fits select 1960-1973 Ford Fairlane, Falcon, Mustang, Torino and Mercury Comet, Cougar, and Cyclone.

The QA1 Stocker Star Series rear shock absorber provides precision suspension tuning for vintage Ford and Mercury platforms. These lightweight billet aluminum shocks feature a smooth body design and offer a direct, bolt-in installation to factory mounting points. With independent 18-way adjustment for both compression and rebound, you can dial in the exact ride quality and handling response needed for street or track performance.

• Double adjustable valving with independent 18-way rebound and compression settings
• Compressed Length: 11 inches
• Extended Length: 15.875 inches
• Lightweight billet aluminum construction with a smooth body finish
• 100% dyno tested and serialized for consistent performance
• Serviceable and rebuildable design for long-term durability
• Made in the USA
• Manufacturer Part Number: TD601

The QA1 Stocker Star Series Double Adjustable Front Shock Absorber provides precision control over your vehicle's front suspension. Featuring independent adjustment knobs for both compression and rebound, this shock allows for fine-tuning without the need to remove it from the vehicle. It is an ideal solution for drivers seeking to optimize weight transfer and handling characteristics for specific track conditions or street performance.

Constructed with a lightweight aluminum body, this shock offers superior heat dissipation and weight reduction compared to standard steel alternatives. The TD510 is designed for durability and consistent damping performance under demanding loads.

• Part Type: Front Shock Absorber
• Adjustment Style: Double Adjustable (Independent Compression and Rebound)
• Material: Lightweight Aluminum
• Compressed Length: 11.5 inches
• Extended Length: 16.5 inches
• Manufacturer Part Number: TD510

The QA1 Stocker Star Series front shock absorber (TD504) delivers high-performance damping control for vehicles utilizing factory-style mounting points. Crafted from lightweight billet aluminum, this smooth-body shock features independent 18-way adjustment for both compression and rebound valving, allowing for precise chassis tuning to suit specific street or track requirements.

• Double Adjustable Valving: Features independent 18-way adjustment dials to dial in the perfect balance of rebound and compression.
• Billet Aluminum Construction: Lightweight, durable material with a smooth finish for superior looks and performance.
• Direct Bolt-In Fitment: Designed for easy installation into factory suspension locations without specialized modifications.
• Precision Tested: 100% dyno tested and serialized to ensure consistent performance; fully rebuildable and serviceable by authorized QA1 centers.
• Technical Specifications: 11.625-inch compressed length; 16.375-inch extended length.
• Quality Guarantee: Proudly made in the USA and backed by a manufacturer limited lifetime warranty.

Fits 1963-1982 Chevrolet Corvette models, including Base, Stingray, and special editions. This QA1 Stocker Star Series rear shock absorber provides independent control over your suspension's compression and rebound characteristics.

Designed as a direct bolt-in replacement for the factory rear shocks, the TD403 features a lightweight aluminum smooth-body design. The double-adjustable valving offers 18 positions of compression and 18 positions of rebound adjustment, providing 324 possible valving combinations to fine-tune your Corvette's handling and ride quality for the street or the track. Each shock is 100% dyno tested and serialized to ensure consistent performance out of the box.

• Manufacturer Part Number: TD403
• Adjustment: Independent 18-way compression and 18-way rebound
• Compressed Length: 10.5 inches
• Extended Length: 14.375 inches
• Body Material: Lightweight aluminum
• Mounting: Stock mount (non-coil-over)
• Serviceability: Fully rebuildable and revalveable
• Origin: Made in the USA
• Includes: Single rear shock absorber and necessary mounting hardware

The QA1 TB102GBK Large Mounting Tab Kit provides a heavy-duty solution for secure shock mounting and accessory attachment on vehicles with boxed tubing chassis components. These tabs are engineered to withstand the stresses of both street and track use, providing a reliable foundation for suspension links, shock absorbers, and custom brackets.

• Designed specifically for mounting to boxed tubing sections
• Large tab profile with a 1/2-inch diameter mounting hole
• Precision-stamped for consistent fitment and weldability
• Versatile application for shocks and chassis accessories
• Complete hardware kit for standard installation
• Manufacturer Part Number: TB102GBK

Kit Includes: (4) Large Mounting Tabs, (2) Bolts, and (2) Nuts.

The QA1 MOD Series Spring Seat Nut Spanner Wrench (T121W) provides the necessary leverage to adjust ride height by moving the spring seat nut on your coilover assembly. Specifically engineered for compatibility with QA1 MOD Series shocks, this tool simplifies the process of tuning your suspension for the street or track.

• Designed for precise adjustment of QA1 MOD Series spring seat nuts
• Zinc-plated finish offers long-lasting durability and corrosion resistance
• Integrated plastic handle provides a comfortable and secure grip during use
• Essential service tool for ride height and preload modifications
• Manufacturer Part Number: T121W

The QA1 T115W Ratchet Drive Spanner Wrench Set is engineered for precise coilover height adjustments in confined wheel wells where standard spanner wrenches lack the necessary swing clearance. By utilizing a 3/8" drive interface, these tools allow you to use a standard ratchet or breaker bar to rotate the spring seat adjuster nut or lock nut with better leverage and control.

This two-piece kit is a essential for any tool box when running QA1 suspension, providing a dedicated wrench for both the primary adjuster and the jam nut. This ensures you can properly lock your settings after corner balancing or ride-height changes without marring the aluminum hardware.

• Manufacturer Part Number: T115W
• Compatibility: Fits all QA1 drag and street shocks (excluding Streeters, Economy Streeters, and MOD Series)
• Drive Size: Compatible with standard 3/8" drive ratchets
• Includes: Two (2) ratchet drive spanner wrenches
• Ideal for tight working conditions where traditional handles cannot reach

The QA1 T114W Spanner Wrench Kit provides the essential tools needed to adjust spring seat and lock nuts on your suspension. Designed specifically for QA1 drag and street series shocks, this kit allows for precise ride height and pre-load adjustments while protecting the finish of your adjuster nuts.

• Includes one wrench for the spring seat adjuster nut
• Includes one wrench for the lock nut
• Compatible with all QA1 drag and street shocks (excluding Streeters and Economy Streeters)
• Not compatible with QA1 MOD Series shocks
• Manufacturer Part Number: T114W

The QA1 SS300LT Upper Eyelet Conversion Kit allows you to adapt QA1 shocks from their original configuration to a secure eyelet mount. This hardware is essential for custom suspension setups or chassis modifications where a loop-style mounting point is required for the upper shock attachment.

This kit is engineered for durability, utilizing a high-quality polyurethane bushing to dampen vibration while maintaining precise suspension geometry. The package includes two distinct sleeve sizes to ensure compatibility with standard 1/2-inch or 5/8-inch mounting hardware.

• Manufacturer Part Number: SS300LT
• Loop Size: 1-inch
• Bushing: 0.75-inch Polyurethane
• Included Sleeves: (1) 1/2-inch I.D. and (1) 5/8-inch I.D.
• Function: Converts QA1 shocks to eyelet style mount

Convert your eyelet (loop) style bottom shocks to a stud mount configuration with the QA1 SS200SD conversion kit. This specialized bracket allows you to adapt a 1/2" eyelet shock to fit into a 3/8" stud mounting location, providing a secure and reliable solution for custom suspension setups or chassis requirements.

Built to handle the demands of both road and track use, this kit ensures proper shock alignment and mounting integrity. Each kit contains the necessary hardware to convert one shock absorber, featuring high-quality components designed for a precise fit.

• Manufacturer Part Number: SS200SD
• Inlet Type: 1/2" Eyelet (Loop)
• Outlet Type: 3/8" Stud
• Components Included: (1) Bracket, (2) Bolts, (2) Washers, (2) Nuts
• Application: Services one shock absorber

The QA1 SS110SDM Stud Top Conversion Kit allows you to adapt your existing QA1 shocks to a flanged stud top mounting configuration. This kit is specifically engineered to convert Proma Star, Ultra Ride, and Aluma Matic shock series, providing a professional solution for custom suspension geometry or specific chassis requirements.

Each kit includes high-quality hardware designed to handle the vertical loads and articulation of performance suspension systems. This kit provides all the necessary components to complete the conversion for one shock, ensuring factory-level fitment and reliability.

• Compatible Shock Series: QA1 Proma Star, Ultra Ride, and Aluma Matic
• Mounting Configuration: Flanged Stud Top
• Kit Components: (1) Stud, (2) Bushings, (3) Washers, (2) Nuts
• Application: Services one (1) shock
• Manufacturer Part Number: SS110SDM

Fits select 2021-2026 Ford F-150 models including XL, XLT, Lariat, King Ranch, Platinum, Limited, Tremor, and Raptor (2WD/4x4).

Lower the center of gravity on your truck without sacrificing ride quality using the QA1 Rear Lowering Kit. This fully bolt-in system provides a adjustable drop range of 3.5 inches to 5.5 inches in half-inch increments on 2WD models. For 4x4 trucks, the removal of the factory lift block provides an additional 1.5 inches of lowering beyond the advertised range. The kit features double-adjustable QA1 Stocker Star shocks, allowing you to independently fine-tune both compression and rebound settings for optimal handling on the street or track.

Constructed from heavy-gauge, powder-coated steel, this kit includes all necessary hardware, flip brackets, shackles, and hangers for a complete installation. Please note that this kit is not compatible with PowerBoost hybrid models or vehicles equipped with Continuously Controlled Damping (CCD) suspension systems.

• Manufacturer Part Number: RDK52632
• Drop Range: 3.5" to 5.5" (2WD); 4x4 models see an additional 1.5" drop
• Shock Type: QA1 Double Adjustable Stocker Star (independent compression/rebound)
• Construction: Heavy-gauge steel components with a durable powder-coated finish
• Installation: Fully bolt-in design requires no specialized fabrication
• Manufacturing: Proudly made in Lakeville, Minnesota, USA
• Warranty: Best-in-class lifetime warranty (registration required at QA1.net)

Fits select 1982-2002 Chevrolet Camaro and Pontiac Firebird models.

Upgrade your third or fourth-generation F-body rear suspension with the QA1 Rear Pro Coil Shock System (MPN RCK52629). This bolt-in coilover conversion kit replaces the factory shock and spring setup, providing a significant improvement in ride quality, handling, and stance. The system features a fully threaded aluminum shock body that allows for up to 1.5 inches of ride height adjustment, letting you precisely dial in your vehicle's center of gravity and wheel gap.

Equipped with QA1 Double Adjustable shocks, this kit offers 18 clicks of independent rebound and compression tuning. This level of control allows you to optimize the suspension for specific street or track conditions without removing the shocks from the vehicle. The 200lbs/in spring rate is specifically chosen to provide a firm, controlled ride that eliminates the floaty feel of aging OE components while remaining comfortable for street use.

• Shock Type: Double Adjustable (18 clicks each for rebound and compression)
• Spring Rate: 200 lbs/in
• Ride Height Adjustment: Up to 1.5" via threaded shock body
• Construction: Lightweight machined aluminum bodies
• Installation: Direct bolt-in; includes all necessary mounting brackets and hardware
• Origin: Made in the USA
• Manufacturer Part Number: RCK52629

Fitment Notes: This kit requires the use of boxed or tubular lower trailing arms. The lower shock mount bracket may not be compatible with some aftermarket rear-end housings. A spanner wrench (P/N T114W or T115W) is required for height adjustment.

Fits select 1978-1996 Buick, Chevrolet, Oldsmobile, and Pontiac B-Body models, including Caprice, Impala SS, Roadmaster, and Delta 88.

Convert your GM B-Body's factory rear suspension to a modern coil-over setup with the QA1 Pro Rear Coil-Over System. This bolt-in conversion kit replaces standard shocks and springs with adjustable aluminum coil-overs, providing significant improvements in both stance and handling. The single-adjustable shocks feature 18 positions of simultaneous rebound and compression tuning, allowing you to dial in the perfect balance for street cruising or performance driving. The fully threaded shock bodies offer precise ride height adjustability, ranging from 0.5 inches higher than stock to a 2.25-inch drop.

This kit includes QA1 lightweight high-travel springs, designed with fewer coils and a smaller wire diameter to reduce unsprung weight and prevent coil bind. Each system is 100% dyno-tested and serialized to ensure consistent performance across both units.

• Manufacturer Part Number: RCK52385
• Adjustment Type: Single Adjustable (18 positions)
• Spring Rate: 300 lbs/in
• Spring Length: 12 inches
• Shock Material: Machined Aluminum
• Installation: Direct Bolt-In (No cutting or welding required)
• Lowering Range: 0.5" above stock to 2.25" below stock
• Kit Includes: (2) Shocks, (2) High-Travel Springs, Mounting Brackets, and Hardware
• Origin: Made in the USA

Fits select 1978-1996 GM B-Body models including Chevrolet Caprice and Impala, Buick Roadmaster and LeSabre, Oldsmobile Delta 88, and Pontiac Bonneville.

Transform your vehicle's handling and stance with the QA1 Pro Rear Coil-Over Conversion System. This bolt-in kit replaces factory shocks and springs with a fully adjustable performance setup designed to improve weight balance and suspension response. The double-adjustable aluminum shocks feature 18 positions of independent compression and rebound adjustment, providing 324 unique valving combinations to bridge the gap between street comfort and track performance.

The system includes American-made, lightweight high-travel springs with a 250 lbs/in rate. These springs utilize fewer coils and a smaller wire diameter to increase travel and reduce unsprung weight. With a fully threaded shock body, you can easily adjust your ride height from 0.5 inches higher than stock to 2.25 inches lower than stock to achieve the perfect center of gravity.

• Manufacturer Part Number: RCK52380
• Double adjustable shocks with 324 valving combinations
• 12-inch x 250 lbs/in high-travel springs
• Lightweight, hard-anodized aluminum shock bodies
• Ride height adjustable from +0.5" to -2.25"
• 100% dyno tested and serialized
• Rebuildable and revalveable by QA1 service centers
• Complete bolt-in installation with no cutting or welding required
• Includes 2 shocks, 2 springs, mounting brackets, and all necessary hardware
• Limited Lifetime Warranty

Fits select 1978-1988 Buick Regal, Chevrolet Malibu, Monte Carlo, El Camino, GMC Caballero, and Pontiac Bonneville/Grand Prix.

The QA1 Rear Pro-Coil Double Adjustable Kit provides a comprehensive suspension upgrade for GM G-Body platforms, replacing factory rear shocks and springs with a versatile coil-over system. These kits are engineered to provide independent control over compression and rebound settings through double-adjustable valving, allowing for precise chassis tuning for both street performance and drag racing applications. The threaded shock bodies facilitate easy ride height adjustments, enabling you to achieve your desired stance in minutes.

• Double-adjustable valving for independent compression and rebound tuning
• Adjustable ride height: 1/2" higher than stock to 2.25" lower than stock
• Sold as a pair including shocks and 12-200 series springs
• Bolts to factory mounting points for straightforward installation
• Made in the USA
• Manufacturer Part Number: RCK52367

Fits select 1978-1988 Buick Regal, Chevrolet El Camino, Malibu, Monte Carlo, GMC Caballero, and Pontiac Bonneville/Grand Prix models.

Dial in the stance and handling of your GM G-Body with the QA1 Pro-Coil rear conversion kit. Designed for precise ride height adjustment, these single adjustable coilovers replace the factory shocks and springs to offer a range from 1/2-inch higher than stock to a 3-inch drop. Whether you are looking to level out your stance or lower the center of gravity for improved cornering, these units provide the flexibility needed for custom tuning.

The single adjustable shocks feature simultaneous rebound and compression valving adjustments, allowing you to firm up the suspension for performance driving or soften it for street comfort with a simple turn of the knob. Every shock is serial numbered and dyno-tested to ensure consistent performance across the pair.

• Adjustable ride height: +0.5 inches to -3.0 inches from factory stock
• Single adjustable valving controls rebound and compression simultaneously
• Lightweight aluminum shock bodies with high-quality coil springs
• Includes 12-200 spring kit components
• Limited Lifetime Warranty (with product registration)
• Proudly made in the USA
• Manufacturer Part Number: RCK52366
• Sold as a pair

Fits 1971-1976 Chevrolet Caprice and Impala models including Base, Classic, Landau, Sport, and Estate variants.

The QA1 Pro-Coil Rear Kit provides a direct bolt-in solution to convert your GM B-Body suspension to a modern coil-over setup. This kit replaces factory shocks and springs with adjustable units, allowing you to fine-tune both your vehicle's stance and its handling characteristics for the street or the track. Engineered for performance and ease of installation, these coil-overs offer a significant upgrade over aged OE components.

• Adjustable Ride Height: Dial in your preferred stance with a height range from 0.5" higher than stock down to 2.25" lower than stock.
• Valving Versatility: Features adjustable rebound and compression valving, allowing you to firm up the suspension for performance or soften it for cruising with the twist of a knob.
• Axle Compatibility: Designed to work with factory rear housings or Quick Performance 9" rear axles.
• Direct Installation: A true bolt-in kit that includes all necessary hardware for installation in a standard home garage or professional shop.
• Technical Specs: Manufacturer Part Number RCK52364; Includes 12-250 series springs; Double-adjustable (D-Adj) valving architecture.
• Quality Assurance: Proudly made in the USA and backed by a limited lifetime warranty; sold as a pair.

Fits select 1964-1972 GM A-Body and G-Body vehicles, including Chevrolet Chevelle, El Camino, Monte Carlo, Pontiac GTO, LeMans, Oldsmobile Cutlass, 442, and Buick Skylark.

The QA1 Pro Rear Coil-Over System is a complete bolt-in conversion designed to modernize your classic GM suspension. This kit replaces the factory separate shock and spring setup with a fully adjustable coil-over configuration, providing significant improvements in both handling and stance. The single-adjustable aluminum shocks feature 18 positions of simultaneous rebound and compression valving, allowing you to fine-tune your ride quality and performance with a simple knob adjustment.

Each kit features lightweight billet aluminum shocks with a fully threaded body for precise ride height control, ranging from 0.5 inches above factory height to a 2.25-inch drop. The included 150 lb/in high-travel springs are paired with vehicle-specific, USA-made mounting brackets to ensure a straightforward installation without the need for custom fabrication.

• Manufacturer Part Number: RCK52340
• Adjustment Type: Single Adjustable (18 valving positions)
• Spring Rate: 150 lbs/in
• Spring Length: 12 inches
• Ride Height Range: +0.5" to -2.25" vs. stock
• Material: Billet aluminum shock body; steel mounting hardware
• Construction: 100% dyno tested and serialized; fully rebuildable and serviceable
• Origin: Made in the USA
• Warranty: Limited Lifetime Warranty

Includes a pair of shocks, high-travel springs, mounting brackets, and all necessary installation hardware.

Fits select 1964-1972 GM A-Body and G-Body vehicles including Chevrolet Chevelle/El Camino, Pontiac GTO/LeMans, Oldsmobile Cutlass/442, and Buick Skylark.

Transform your vehicle's rear suspension with the QA1 Pro Rear Coil-Over Conversion Kit. This bolt-in system replaces traditional shocks and springs with a fully adjustable setup, providing the ultimate balance of ride quality and performance handling. These double-adjustable aluminum shocks feature independent 18-position knobs for both compression and rebound, offering 324 total valving combinations to suit street performance, drag racing, or autocross applications.

The lightweight billet aluminum shocks utilize a fully threaded body for precise ride height adjustment, allowing you to achieve a stance ranging from 0.5 inches higher than stock to 2.25 inches lower. Each kit is manufactured in the USA, 100% dyno tested, and remains fully serviceable and rebuildable for long-term reliability.

• Valving: Independent double-adjustable (18 positions rebound / 18 positions compression).
• Spring Rate: 170 lbs/in high-travel springs.
• Adjustability: 12-inch shock length with threaded body for ride height tuning (+0.5" to -2.25").
• Materials: Lightweight billet aluminum shocks and USA-made mounting brackets.
• Serviceability: Serialized, 100% dyno tested, and rebuildable.
• Warranty: Manufacturer Limited Lifetime Warranty.
• MPN: RCK52337

Includes: A pair of double-adjustable shocks, high-travel springs, mounting brackets, and all required installation hardware.

Fits select 1964-1972 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac A-Body and G-Body vehicles. This bolt-in Rear Coil-Over Conversion Kit replaces your factory rear suspension setup with a high-performance, adjustable system designed for superior handling and stance control.

The QA1 Pro Rear Coil-Over System (RCK52336) features double-adjustable aluminum shocks, providing independent control over both rebound and compression. With 18 positions for each, you can access 324 possible valving combinations to tune your vehicle for anything from casual street cruising to aggressive track use. The shocks utilize a fully threaded billet aluminum body, allowing for precise ride height adjustments ranging from 0.5" higher than stock down to 2.25" lower than stock.

Each kit is manufactured in the USA and include specially designed mounting brackets and high-travel springs for a complete, bolt-on installation. Every shock is 100% dyno tested and serialized to ensure consistent performance across the pair.

• Manufacturer Part Number: RCK52336
• Adjustment Type: Double Adjustable (18 positions compression, 18 positions rebound)
• Valving Combinations: 324
• Spring Rate: 150 lbs/in
• Spring Length: 12in
• Shock Material: Lightweight Billet Aluminum
• Ride Height Range: +0.5" to -2.25" from stock
• Origin: Made in the USA
• Warranty: Limited Lifetime Warranty

Includes a pair of shocks, springs, mounting brackets, and all necessary installation hardware.

Fits 1967-1969 Chevrolet Camaro and Pontiac Firebird (Base, RS, SS, Z28, Trans Am, and select engines).

Ditch the factory leaf springs and take control of your F-body with the QA1 MOD Series Rear Triangulated 4-Link Suspension System. This upgrade replaces outdated OE components with tubular 4-link geometry and high-performance coilovers, significantly improving ride quality and handling while providing a custom stance. The triangulated design provides superior lateral stability without requiring a Panhard bar, making it an ideal solution for street and track performance.

• MOD Series Shocks: Equipped with 4-way adjustable valving for independent tuning of high- and low-speed compression and rebound.
• Adjustable Ride Height: Achieve the perfect stance with +2 inches to -3 inches of ride height adjustability.
• Increased Wheel Clearance: Designed to accommodate wider wheels, supporting up to 11-inch widths on 1967-1968 models and 12-inch widths with 335 tires on 1969 models (requires mini-tubs for maximum width).
• Simplified Maintenance: Fine-tune pinion angle, wheelbase, or ride height without removing links.
• Durable Construction: Made in the USA with high-strength tubular links and precise mounting points.

• Manufacturer Part Number: R356-170
• Adjustability: 4-Way Independent Valving
• Ride Height Range: +2" to -3"
• Fitment Requirement: Welding required; no floor pan modifications needed
• Included: MOD Series shocks, tubular 4-link, spanner wrench, and hardware

Fits 1968-1972 Chevrolet Chevy II, Nova, and Pontiac Ventura.

Replace restrictive factory leaf springs with the QA1 triangulated 4-link suspension system to transform the handling and stance of your GM X-Body. This conversion provides precise axle control and enables +2 to -3 inches of ride height adjustability, allowing you to achieve a custom stance without compromising ride quality. The tubular design increases chassis rigidity and creates the necessary clearance for significantly wider wheel and tire combinations.

The system features QA1 double-adjustable shocks, providing independent control over compression and rebound settings for fine-tuned performance on both the street and the track. Installation is engineered for efficiency, requiring minimal welding and zero modifications to the factory floor pan. While designed for generous clearance, achieving maximum tire width will require mini-tubs.

• Manufacturer Part Number: R258-170
• Ride Height Range: +2 in. to -3 in. adjustability
• Wheel/Tire Fitment: Accommodates up to 11-in. wide wheels and 315mm tires (requires mini-tubs for maximum width)
• Shock Type: Double-adjustable coilovers for independent compression and rebound tuning
• Design: Triangulated tubular 4-link; no floor pan modifications required
• Installation: Minimal welding required; includes spanner wrench
• Manufacturing: Made in Lakeville, Minnesota, USA
• Warranty: Lifetime shock coverage available through QA1 registration